Crispy Roasted Sliced Potatoes and Onions Tips, FAQ & printable recipe

Tips for success

For extra flavor, consider adding fresh herbs like rosemary or thyme to the potato mixture before roasting. Toss the herbs with the potatoes to ensure they distribute evenly. The heat of the oven will release the aromatic oils from the herbs, infusing the potatoes with a subtle, earthy fragrance that pairs perfectly with the sweetness of the caramelized onions.

If the potatoes are not browning as desired toward the end of the cooking time, you can briefly increase the oven temperature or move the dish to a higher rack. Keep a close watch during this time to prevent burning. The visual cue of a deep golden-brown edge is the best indicator of a perfectly roasted potato that provides a satisfying crunch in every bite.

Variations

• Garlic Herb Potatoes: Add three cloves of minced garlic and a tablespoon of fresh chopped rosemary to the potato mixture before roasting. The garlic will roast along with the potatoes, adding a savory, aromatic depth that pairs exceptionally well with the caramelized onions.
• Smoky Paprika Potatoes: Incorporate one teaspoon of smoked paprika into the mixture before roasting. The smoky flavor adds a unique, bold character to the roasted potatoes and onions, making them an excellent accompaniment to grilled meats or barbecue-style main courses.

Storage and make-ahead

Fridge

Store in an airtight container in the refrigerator for up to 3 days. Ensure the potatoes have cooled for no more than 2 hours before refrigerating.

Reheat

Reheat in a preheated 350°F (175°C) oven or toaster oven on a baking sheet until heated through and crisp, approximately 10 to 15 minutes.

If there are leftovers, allow them to cool completely at room temperature for no more than two hours before transferring them to an airtight container. Storing them correctly helps maintain their texture as much as possible.

Place the container in the refrigerator, where the potatoes will stay fresh for up to three days. When ready to eat again, they are best reheated in an oven or toaster oven to regain some of their original crispiness.

While this dish is best served immediately for optimal texture, you can peel and slice the potatoes ahead of time. Store the sliced potatoes in a bowl of cold water in the refrigerator to prevent discoloration.

When you are ready to cook, drain the potatoes thoroughly and pat them very dry with paper towels before arranging in the baking dish. This preparation step saves time without compromising the quality of the final roasted dish.

Serving ideas

Serve these potatoes immediately while they are hot and at their crispiest. A metal spatula is the best tool for transferring the potatoes to plates, as it allows you to scoop up the crispy bottom layer and the caramelized onions along with the tender potato slices.

The contrast between the crispy edges and the soft interior is most pronounced when the dish is fresh from the oven, making for a delightful presentation.

These potatoes serve as an excellent side dish for a variety of meals. They pair beautifully with roasted meats, grilled fish, or even a simple pan-seared protein.

The versatility of the flavor profile means they can be served at a casual family dinner or as part of a more elaborate meal. Provide a simple garnish of fresh herbs if desired, though the dish is flavorful enough to stand perfectly on its own.

Frequently asked questions

Recipe card

Crispy Roasted Sliced Potatoes and Onions

Prep 15 minCook 45 minRest 5 minTotal 1 h 5 minServes 4

Ingredients

• 2 lb russet potatoes, peeled and thinly sliced
• 2 yellow onions, thinly sliced

Instructions

1. Preheat the oven to 400°F (200°C). Peel the russet potatoes and use a mandoline or sharp knife to slice them into uniform, thin rounds. Peel the yellow onions and slice them into thin strips. Place the sliced potatoes and onions into a large mixing bowl to prepare for roasting.
2. Arrange the sliced potatoes and onions in an even, overlapping layer inside a large glass baking dish. Ensure the mixture is distributed evenly across the bottom of the dish to allow for consistent browning and crispy edges during the roasting process.
3. Place the baking dish in the center of the preheated oven. Roast for 45 minutes, or until the potatoes are tender when pierced with a fork and the edges are deep golden brown and crispy. Remove from the oven and let rest for 5 minutes before serving with a metal spatula.

Estimated nutrition per serving

Calories

180

Protein

4 g

Carbohydrates

38 g

Fat

0.5 g

Automatic estimate from the ingredient list, not laboratory-verified.